Certain 10-basically substituted-5h-dibenzo[b,e,][1,4]diazepine compounds



United States Fatent Oflice 3,419,547 Patented Dec. 31, 1968 78, 1 21 Claims. (Cl. 260-2393) This application is' a continuation-in-part application of applicants co-pending application Ser. No. 57,141, filed Sept. 20, 1960, now abandoned.

This invention relates to novel heterocyclic nitrogencontaining compounds and a method of producing the same.

We have found that valuable therapeutic agents comprising certain basic substituted H-dibenzo[b,e][1,4] diazepine compounds can be obtained by introducing a tertiary aminoalkyl group into the corresponding unsubstituted SH-dibenzo[b,e][1,4]diazepines. Our new compounds are characterized by the inclusion of a basic side chain or substituent on the lfl-nitrogen atom of the C N nng.

The starting materials to be used in accordance with the present invention are represented by the following Formula I and the basic substituted 5H-dibenzo[b,e][1,41diazepine compounds obtained from Formula I, in accordance with the present invention, are represented by the following Formula II In the Formulas I and II the letter symbols have the following meanings: R represents hydrogen, methyl or ethyl; XY represents a basic radical wherein X is a normal or branched hydrocarbon chain containing between 2 and 3 inclusive carbon atoms (preferably, an ethyl, propyl or isopropyl chain), and Y is a dialkylamino group having between 2 and 4 inclusive carbon atoms (preferably, dimethylamino or diethylamino), a 5- and a 6- membered cycloalkylamino group (preferably,piperidino or pyrrolidino), or a G-membered cycloalkylamino group wherein one CH group thereof is replaced by a member of the class consisting of O--, NH-,

(preferably, morpholino, N-methylpiperazino or N'- ethylpiperazino); and R and R are hydrogen, chlorine,

methyl, ethyl, methoxy, ethoxy, trifluormethyl, methylmercapto, or ethylmercapto.

The introduction of the basic radical -X-Y in place of a hydrogen in the 10-position in compounds of the type represented by Formula I to obtain the compounds of Formula II may be elfected in several ways of which the following techniques are exemplary:

(a) The Formula I compound may be reacted with an ester of a tertiary aminoalkanol having the formula Z-X-Y wherein X and Y have the meanings described above and Z represents an acid radical, particularly the radical of a strong inorganic or organic acid such as a hydrohalogen acid or an organic sulfonic acid. This reaction is preferably carried out by prior or concurrent metallization of the Formula I compound using a suitable condensation agent, particularly the alkali metals, their hydrides, amides, or other organic alkali metal compounds, e.g. sodium amide, sodium hydride, phenyl sodium, or tertiary butyl sodium.

(b) The introduction of the basic radical X-Y into the Formula I compound may also take place in two steps. First, a halogen alkyl group of the formula X-Hal is introduced into the Formula I compound at the 10-position, e.g. by reaction with an ester of the corresponding halogen alkanol having the formula Z-XHal Where Hal represents halogen and Z and X have the meanings described above, or by reaction with an alkylene oxide followed by esterification with a hydrohalogen acid. Second, the resulting halogen compound from the first step is reacted with a secondary amine of the formula H-Y or a corresponding tertiary derivative where Y has the meaning described above.

If the starting material of Formula I has a hydrogen atom in both the 5- and the 10-positions, the resultant compound having the Formula II will comprise an unsubstituted nitrogen atom in the 5-position. Thus, in the case of a starting material of the Formula I having hydrogen at both the 5- and 10-positions, it has been unexpectedly found that the basic radical X-Y is introduced into the l0-position leaving the 5-position unsubstituted and available for subsequent alkylation. The latter compound may be subsequently alkylated by any convenient method, e.g. by a condensation technique similar to (a) above, wherein the 5- unsubstituted diazepine compound is reacted with an ester of the formula R -Z wherein R is the desired alkyl substituent and Z has the meaning already described.

The starting materials having the Formula I can be obtained by effecting ring closure or cyclization of the corresponding N-alkyl-2aminodiphenylamine-2-carboxylic acids or alkyl esters thereof.

The compounds of the Formula II type are strong bases which may readily be converted to water soluble, pharmaceutically active, non-toxic salts. For example, suitable inorganic acid addition salts include the hydrochlorides, hydrobromides, sulfates, nitrates, and phosphates. Suitable organic acid salts may also be formed, e.g. the acetates, oxalates, malonates, succinates, malates, maleates, tartrates, or toluene sulfonates.

The non-toxic monoand di-quaternary ammonium salt derivatives are also therapeutically useful, such derivatives being obtained, for example, by reacting the bases with a quaternizing agent such as dialkylsulfate, an alkyl halide, or a sulfonic acid alkyl ester. Inorganic and organic acid salts of the monoand di-quaternary salts may also be formed as described above. The quaternary ammonium derivatives of the Formula II compounds may also be obtained by introducing into the Formula I starting materials a quaternary ammonium derivative of the tertiary aminoalkyl radical -X--Y instead of the radical X--Y per se.

The Formula II compounds of the present invention,

including the bases per se as well as their quaternary ammonium derivatives and the acid addition salts of the same, are useful as antihistamines, analgesics, spasmolytics, anti-Parkinson agents, tranquilizers, and psychic energizers, thymoleptics or psycho stimulants. The usual dosage unit forms of therapeutic administration may be employed. For example, the active substance may be composited with a suitable pharmaceutical carrier to provide solutions, syrups, spray compositions, tablets, capsules, sup ositories, powders, or the like.

For the manufacture of tablets, the products of the present invention, preferably in the form of the hydrochlorides or of the maleates, can be mixed with lactose and granulated with water, 0.5% sodium alginate solution or 1% gelatin solution. The dried granulate can be compressed into tablets in the presence of about 5% of talcum, 5% of corn starch and 0.1% magnesium stearate. In this way, there are obtained, for example, tablets of the following composition, tablets (a) and (b) showing antihistaminic, and tablets (c) thymoleptic activity:

7 chloro lOB-dimethylamino-ethyl-10,1l-dihydro- 11-oxo-5H-dibenzo[b,e][1,41dinzepine 5 Lactose 175 Corn starch 10 Talcum 10 Magnesium stearate 0.2

Tablet weight: 0.200 gm.

5 methyl-7-chloro-lO-fl-dimethylamino-ethyl-10,1l-

dihydro l1 oxo-5H-dibenzo[b,e][1,4]diazepine hydrochloride l Lactose 144 Corn starch 8 Talcum 8 Magnesium stearate 0.2

Tablet weight: 0.170 gm.

methyl-1o-fi-dimethylamino-ethyl-l0,1l-dihydroll-oxo-5H-dibenzo[b,e][l,4]diazepine maleate l5 Lactose 147 Corn starch 9 Talcum 9 Magnesium stearate 0.2

Tablet weight: 0.180 gm.

Injectable solutions are obtained, for example, by dissolving in bidistilled Water the products of the present invention in the form of their hydrochlorides or other salts, and by adding sodium chloride or glucose until isotonic concentration is reached. The solutions are filtered free of germs, filled into ampoules and sterilized for 30 minutes at 120 C. in the autoclave. In this way, there are obtained, for example, injectable solutions of Suppositories are obtained, for example, by grinding to a fine powder the products of the present invention in the form of bases or salts, by mixing intimately with a molten suppository mass (e.g. Oleum Cacao, Witten mass and the like) if necessary in the presence of paraffin oil, by pouring the mixture into moulds and by allowing to cool at low temperature. In this way, there are obtained, for example, suppositories of the following composition, having antihistaminic (a) and thymoleptic (b) activity:

Mg. 7 chloro 10-B-dimethylamino-ethyl-l0,ll-dihydroll-oxo-5H-dibenzo[b,e] [l,4]diazepine 5 Oleum Cacao 300 5 methyl 10 'y-dimethylamino-propyl-10,1l-dihydro ll oxo 5H dibenzo[b,e] [l,4]diazepine maleate l0 Paraffin oil Oleum Cacao 210 The following Table I shows the doses of exemplary compounds which are effective in preventing asphyxia in 50% of the test animals (ED 50) exposed to histamine aerosol, in mg./kg. per 05.

The following Table II shows the analgesic effect of exemplary compounds in rabbits. The dental pulp of the test animal is electrically irritated until pain reaction occurs. The intensity of current in a, which is necessary to evoke a pain reaction in the untreated animal (control) being the last column gives the percentage of current necessary for animals, to which l/7 of the LD 50 (dose which is lethal for 50% of the animals) has been administered by mouth.

EXAMPLE 1 6.31 g. (0.03 mol) of 1l-hydroxy-SH-dibenzo[b,e,] [1,4]diazepine were boiled for 1 hour with 1.40 g. (0.036 mol) of powdered sodium amide in 50 ml. of absolute dioxane. After adding a concentrated benzenic solution of 0.039 mol of fi-dimethylarninoethyl chloride, which had been freshly prepared by decomposing an equivalent quantity (5.62 g.) of the hydrochloride with concentrated sodium hydroxide solution, taking up in benzene and drying the solution with potash, the mixture Was boiled for 16 hours under reflux, whereupon the reaction mixture was concentrated to dryness and the residue distributedbetween ether and water. By exhaustive extraction of the basic fractions with dilute acetic acid, precipitation with ammonia, taking up the base in ether and working up the ethereal solution, there were obtained 6.75 g. (80% of the theoretical) of -B-dimethylaminoethyl 10,11 dihydro ll-oxo-SI-I-dibenzo- [b,e][1,4]diazepine with a boiling point of about 210 C./ 0.05 mm. Hg, which could be crystallized from etherpetroleum ether (1:4) in the form of granules with the melting point 112 to 114 C.

EXAMPLE 2 From 6.31 g. of the same starting material as in Example 1, there were obtained with the corresponding quantity of 'y-dimethylaminopropyl chloride, using the same procedure as in Example 1, 7.74 g. (87% of the theoretical) of crude 10-y-dimethylarninopropyl-10,1l-dihydro-11-oxo-5I-I-dibenzo[b,e] [1,4] diazepine as a yellowish viscous resin.

By reacting the crude resin with an equimolar quantity of hydrochloric acid in methanol, evaporating the solvent and recrystallizing from methanol-ether (1:3), the hydrochloride was obtained with a melting point 222 to 226 C.

EXAMPLE 3 EXAMPLE 4 Using the same procedure as in Example 3, and employing 6.72 g. of the same diazepine as well as a corresponding quantity of 'y-dimethylaminopropyl chloride, there were obtained 6.95 g. (75% of the theoretical) of 5 methyl 10 'y dimethylaminopropyl 10,11 dihydro-l1-oxo-5H-dibenzo[b,e] [1,41diazepine as a viscous, yellowish resin with the boiling point 205 C./0.05 mm. Hg. The base was crystallized from ether-petroleum ether, melting point 75-78 C.

EXAMPLE 5 Using the same procedure as in Example 1, there were obtained from 11 g. of 8-chloro-1l-hydroxy-SH-dibenzo [b,e][1,4]diazepine and 2.05 g. of sodium amide in 100 ml. of absolute dioxane on the one hand, and a benzenic solution of ,B-dimethylaminoethyl chloride freshly prepared 6 from 8.4 g. of the hydrochloride, on the other hand, 10.58 g. (74% of the theoretical) of 8-chloro-10-B-di methylaminoethyl 10,11 dihydro 11 oxo 5H dibenzo[b,e][1,4]diazepine in the form of coarse, reddish granules with the melting point of 144 to 145 C. (from ether-petroleum ether 1:4).

EXAMPLE 6 Using the same procedure as in Example 5, and using 9.79 g. of the same diazepine as well as a corresponding quantity of -dimethylaminopropyl chloride, there were obtained 13.11 g. (almost 100% of the theoretical) of crude 8 chloro 10 'y dimethylaminopropyl 10,11- dihydro 11 oxo 5H dibenzo[b,e][1,4]diazepine in the form of a viscous red resin.

By reacting the crude base with an equivalent quantity of hydrochloric acid in methanol, evaporating the solvent and recrystallizing the dry residue from methanol-ether 1:3, the hydrochloride was obtained. in the form of reddish, lustrous granules, melting point of 249-25 1 C.

EXAMPLE 7 Using the same procedure as in Example 1, and from 8.60 g. of 5-methyl8-chloro-1l-hydroxy-SH-dibenzo[b,e] [1,4ldiazepine and 1.6 g. of sodium amide in 50 ml. of absolute dioxane on the one hand, and a benzenic solution of B-dimethylaminoethyl chloride freshly prepared from 6.8 g. of the hydrochloride, on the other hand, there were obtained 10.5 g. (almost 100% of the theoretical) of crude 5 methyl 8 chloro 10 ,8 dimethylaminoethyl 10, 11-dihydro-11-oxo-5H-dibenzo[b,e] [1,4]diazepine in the form of a reddish, viscous resin, which had a boiling point of about 190 C./0.05 mm. Hg and which could only be distilled with considerable decomposition.

By reacting the crude base with an equivalent quantity of hydrochloric acid in methanol, evaporating the solvent and recrystallizing the dry residue from methanol-ether 1:3, the hydrochloride was obtained in the form of solid, lustrous granules with the melting point of 240 to 245 C.

EXAMPLE 8 Using the same procedure as in Example 7 and using 5.60 g. of the same diazepine as well as a corresponding quantity of 'y-dimethylaminopropyl chloride, there were obtained 6.35 g. (85% of the theoretical) of 5-methyl-8- chloro 10 'y dimethylaminopropyl 10,11 diyhdro- 11-oxo-5H-dibenzo[b,e] [1,4]diazepine as a yellowish, viscous resin with a boiling point of 192 to 193 C./ 0.01 mm. Hg.

By reacting the crude base with an equivalent quantity of hydrochloric acid in methanol, evaporating the solvent and recrystallizing the dry residue from acetone-ether 1:3, the hydrochloride was obtained with a melting point 193 to 197 C.

EXAMPLE 9 1.23 gm. of S-methyl-10-,8dimethylaminoethyl-10,1l-dihydro-11-oxo-5H-dibenzo[b,e] [1,4] diazepine (prepared as in Example 3) was dissolved in 20 ml. of benzene and an equimolar quantity of dimethyl sulfate was added. After letting stand overnight, the crystalline precipitate was removed by suction, washed with benzene and recrystallized from methanol-ether. There was obtained 1.18 gm. of metho-sulfate with a melting point of -185 C.

EXAMPLES 10-47 Following the procedure of the preceding examples, the compounds listed in the following Table III were obtained from the corresponding starting materials. In this table, R R R and -X-Y are 'the corresponding groups of the products Formula II:

9 We claim: 1. A compound selected from the group consisting of: (A) the substituted 5H-dibenzo[b,e] [l,4]diazepine derivatives of the formula wherein R is selected from the class consisting of hydrogen, methyl and ethyl; XY is a basic radical wherein X is a hydrocarbon :chain containing between 2 and 3 inclusive carbon atoms, and Y is selected from the class consisting of dialkylamino having between 2 and 4 inclusive carbon atoms, piperidino, pyrrolidino,

N-(lower alkyl)-2-piperidyl, morpholino, l-piperazinyl,

4-(l0wer alkyl)-l-piperazinyl, 4-(hydroxy-lower alkyl)- l-piperazinyl and 4-(methoxy-l0wer alkyl)-1piperazinyl and R and R are selected from the class consisting of hydrogen, chlorine, methyl, ethyl, methoxy, ethoxy, trifluormethyl, methylmercapto, and ethylmencapto; (B) the non-toxic therapeutically useful quaternary ammonium salts of (A); and (C) the nontoxic therapeutically useful acid addition salts of (A) and (B).

2. 7 chloro 10 B dimethylaminoethyl 10,11- dihydro-l l-oxo-SH-dibenzb [b,e] [1,4] diazepine.

3. A non-toxic, water soluble acid addition salt of 7- chloro l [i dimethylaminoethyl 10,11 dihydro- 1 1-oX0-5H-dibenzo["b,e] [1,4] diazepine.

4. 5 methyl 7 chloro 10 3 dimethylaminoethyl- 10,1l-dihydro-l1-ox0-5H-dibenzo[b,e] [1,4] diazepine.

5. A nontoxic, water soluble acid solution salt of 5- methyl 7 chloro 10 p1 dimethylaminoethyl 10,11- dihydro-11-oxo-5H-dibenzo[b,e] [1,4] diazepine.

6. 7 chloro 10 ,8 pyrrolidinoethyl 10,11 dihydro-l1-oxo-5H-dibenzo[b,e] [1,4]diazepine.

7. A non-toxic, water soluble acid addition salt of 7- chloro 10 B pyrrolidinoethyl 10,11 dihydro 11- OXO'SH-dibBIIZO [b,e] [1,4]diazepine.

8. 3 chloro 10 18 dimethylaminoethyl 10,11 dihydro-1 1-oxo-5H-dibenzo[b,e] [1,4]diazepine.

9. A non-toxic, water soluble acid addition salt of 3- chloro 10 B dimethylaminoethyl 10,11 dihydro- 11-oxo-5H-dibenzo[-'b,e] [1,4]diazepine.

10. 10 B dimethylaminoethyl 10,11 dihydro 11- oxo-5H-dibenzo[b,e] [1,4]diazepine.

11. 8-chloro 10-B-dimethylaminoethyl-l0,1l-dihydro- 11-oxo-5H-dibenzyl[b,e] [1,4] diazepine.

12. 5 methyl 10 p2 pyrrolidino ethyl 10,11- dihydro-l l-oxo-5Hdibenzo[b,e] [1,4]diazepine.

13. 5 methyl 10 3 N methyl piperazino ethyl- 10,11-dihydro-11-oxo-5H-dibenzo[b,e] 1,4]diazepine.

14. 5 methyl 10 fl dimethylamino ethyl 10,l1- dihydro-11-oxo-5Hdibenzo[b,e] [1,4] diazepine.

15. A non-toxic, water soluble acid addition salt of 5- methyl 10 ,8 dimethylamino ethyl 10,11 dihydro- 11-oXo-5H-dibenzo['b,e] 1,4]diazepine.

16. 5 methyl 10 'y dimethylamino propyl 10,11- dihydro-11-oxo-5H-dibenzo[h,e] [1,4]diazepine.

17. 5 methyl 10 y N methyl piperazinopropyl 10,11 dihydro 11 oxo-5H-dibenzo[b,e] [1,4] diazepine.

18. 5 methyl l0 ,8 morpholino ethyl 10,11- dihydro-1l-oxo-5H-dibenzo[b,e] [1,4]diazepine.

19. 5 methyl 10 ,8 piperidino ethyl 10,11 dihydro-l l-oxo-SH-dibenzo [b,e] 1,4] diazepine.

20. A compound of the formula:

wherein R is a member selected from the group consisting of CH and C H and R is a member selected from the group consisting of Cl, CF CH and C H 21. A compound of the formula CH2CH2-N wherein R is a member selected from the group consisting of CH and C H and R is a member selected from the group consisting of H, Cl, (3P CH and C H References Cited UNITED STATES PATENTS 2,852,510 9/1958 Holfmann et a1. 260327 ALTON D. ROLLINS, Primary Examiner.

US. Cl. X.R. 167-65 UNITED STATES PATENT OFFICE CERTIFICATE OFCORRECTION Patent No. 3,419,547 December 31, 1968 Jean Schmutz et a1.

It is certified that error appears in the above identified patent and that said Letters Patent are hereby corrected as shown below: Columns 7 and 8, TABLE III, first column, line 8 thereof, the

formula should appear as shown below:

-CH -CH CH -N N-CH Column 9, line 54, "dibenzyl" should read dibenzo Signed and sealed this 24th day of March 1970.

(SEAL) Attest:

WILLIAM E. SCHUYLER, JR.

Commissioner of Patents Edward M. Fletcher, Jr. Attesting Officer 

1. A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) THE SUBSTITUTED 5H-DIBENZO(B,E)(1,4)DIAZEPINE DERIVATIVES OF THE FORMULA 